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Income Taxes (Tables) | 6 Months Ended
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Jun. 30, 2023
Income Taxes [Line Items] |
Schedule of Effective Income Tax Rate Reconciliation | Reconciliations of income tax expense (benefit) for the periods ended June 30 are as follows.
(PPL)
| Three Months |  | Six Months
| 2023 |  | 2022 |  | 2023 |  | 2022
Federal income tax on Income Before Income Taxes at statutory tax rate - 21% | $ | 30 |  |  | $ | 32 |  |  | $ | 107 |  |  | $ | 104 |
Increase (decrease) due to: |  |  |  |  |  |  |
State income taxes, net of federal income tax benefit | 11 |  |  | 27 |  |  | 33 |  |  | 48 |
Valuation allowance adjustments | 5 |  |  | 7 |  |  | 7 |  |  | 10 |
Amortization of investment tax credit including deferred taxes on basis adjustment | — |  |  | (4) |  |  | (1) |  |  | (7) |
Depreciation and other items not normalized | (2) |  |  | (5) |  |  | (7) |  |  | (8) |
Amortization of excess deferred federal and state income taxes | (8) |  |  | (22) |  |  | (20) |  |  | (40) |
Other | (3) |  |  | (3) |  |  | (7) |  |  | (1) |
Total increase (decrease) | 3 |  |  | — |  |  | 5 |  |  | 2 |
Total income tax expense (benefit) | $ | 33 |  |  | $ | 32 |  |  | $ | 112 |  |  | $ | 106 |
PPL Electric Utilities Corp [Member] |
Income Taxes [Line Items] |
Schedule of Effective Income Tax Rate Reconciliation | Reconciliations of income tax expense (benefit) for the periods ended June 30 are as follows.
(PPL Electric) |  |  |  |  |  |  |
| Three Months |  | Six Months
| 2023 |  | 2022 |  | 2023 |  | 2022
Federal income tax on Income Before Income Taxes at statutory tax rate - 21% | $ | 31 |  |  | $ | 35 |  |  | $ | 70 |  |  | $ | 76 |
Increase (decrease) due to: |  |  |  |  |  |  |
State income taxes, net of federal income tax benefit | 11 |  |  | 13 |  |  | 24 |  |  | 28 |
Depreciation and other items not normalized | (3) |  |  | (3) |  |  | (7) |  |  | (6) |
Amortization of excess deferred federal and state income taxes | (2) |  |  | (2) |  |  | (4) |  |  | (5) |
Other | 1 |  |  | 1 |  |  | — |  |  | 1 |
Total increase (decrease) | 7 |  |  | 9 |  |  | 13 |  |  | 18 |
Total income tax expense (benefit) | $ | 38 |  |  | $ | 44 |  |  | $ | 83 |  |  | $ | 94 |
Louisville Gas And Electric Co [Member] |
Income Taxes [Line Items] |
Schedule of Effective Income Tax Rate Reconciliation | Reconciliations of income tax expense (benefit) for the periods ended June 30 are as follows.
(LG&E) |  |  |  |  |  |  |
| Three Months |  | Six Months
| 2023 |  | 2022 |  | 2023 |  | 2022
Federal income tax on Income Before Income Taxes at statutory tax rate - 21% | $ | 12 |  |  | $ | 13 |  |  | $ | 35 |  |  | $ | 37 |
Increase (decrease) due to: |  |  |  |  |  |  |
State income taxes, net of federal income tax benefit | 2 |  |  | 2 |  |  | 6 |  |  | 7 |
Amortization of excess deferred federal and state income taxes | (3) |  |  | (7) |  |  | (6) |  |  | (14) |
Other | — |  |  | 1 |  |  | (1) |  |  | (2) |
Total increase (decrease) | (1) |  |  | (4) |  |  | (1) |  |  | (9) |
Total income tax expense (benefit) | $ | 11 |  |  | $ | 9 |  |  | $ | 34 |  |  | $ | 28 |
Kentucky Utilities Co [Member] |
Income Taxes [Line Items] |
Schedule of Effective Income Tax Rate Reconciliation | Reconciliations of income tax expense (benefit) for the periods ended June 30 are as follows.
(KU) |  |  |  |  |  |  |
| Three Months |  | Six Months
| 2023 |  | 2022 |  | 2023 |  | 2022
Federal income tax on Income Before Income Taxes at statutory tax rate - 21% | $ | 13 |  |  | $ | 17 |  |  | $ | 36 |  |  | $ | 45 |
Increase (decrease) due to: |  |  |  |  |  |  |
State income taxes, net of federal income tax benefit | 3 |  |  | 3 |  |  | 7 |  |  | 8 |
Amortization of excess deferred federal and state income taxes | (4) |  |  | (6) |  |  | (8) |  |  | (12) |
Other | 1 |  |  | 1 |  |  | — |  |  | (2) |
Total increase (decrease) | — |  |  | (2) |  |  | (1) |  |  | (6) |
Total income tax expense (benefit) | $ | 13 |  |  | $ | 15 |  |  | $ | 35 |  |  | $ | 39 |

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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Paragraph 12 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-12 + Details
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